Data URL to BLOB

gistfile1.js

function dataUrlToBlob(dUrl) {
  return new Blob([new Uint8Array(atob(dUrl.slice(
  	dUrl.indexOf(',') + 1)).split(/\b|\B/).map(function(c){return c.charCodeAt(0)}))], 
  	{type:dUrl.match(/\:([^;]*)/)[1]});
}

// Example:
var OneByTwoRo_data_url = "data:image/jpeg;base64,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";
		
var blob_url = URL.createObjectURL(dataUrlToBlob(OneByTwoRo_data_url));